Plan ing-machine



' (No Model.) 2 sheets-sheet 1.

J. SORENSON.

PLANING MACHINE.

' (No M01161. 2 Sheets-Sheet J. SORENSON.

PLANING MACHINE.

110. 460,187. Patented Sept. 29, 1891.

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E wwme awo angel Wm UNITED STATES PATENT OFFICE.

JOSEPH SORENSON, OF CHICAGO, ILLINOIS.

PLANING-M ACHINE.

SPECIFICATION forming part of Letters Patent No. 460,187, datedSeptember 29, 1891.

Application filed April 5, 1890.

To all whom it may concern.-

Be it known that I, JOSEPH SoRENsoN, a subject of the King of Sweden andNorway, residing at Chicago, in the county of Cook and State ofIllinois, have invented a new and useful Improvement inPlaning-Machines, of which the following is a specification.

My invention relates to improvements in that class of planers whiclrisintended to plane both the-warp and wind out of the material beingworked,so that the machine is adapted to a greater variety of duty thanplaners of the ordinary construction.

One of my objects is to combine with a rotary cutting head or cylinderoperating below the material being planed a compressible bedplate, whichreceives the lumber to be planed before it contacts with the revolvingknives. This compressible bed-plate, being so constructed that it willreadily yield over every part of its surface which contacts with thelumber, thus holds the lumber in its original shape and at the same timepermitsthe upper feed-rolls to force it against the revolving knives,which level its under surface. I attain these objects by the mechanismillus trated in the accompanying drawings, in which Figure 1 is a frontor feeding-in end perspective View. Fig. 2 is a vertical longitudinalview on line 00 3 Fig. 1, showing some parts in section and others inperspective view. Fig. 3 is a view of one combination of parts for acompressible bed-plate, together with detached views of one of thecompressible rollers at the right side of drawing and a detached view ofcompressible pressure-bar shown at the left side of drawing. Fig. 4. isa front view of the frame and side supports for carrying the front upperfeed-rollers. Fig. 5 is a side view of Fig. 4 and an end section on linew y of the projections of the frame, which secure it to the main frameof the machine, as will be described.

Similar letters refer to like parts throughout the several views.

It will be understood in the description of this machine that theimprovement consists in the application of a compressible bed-plate,which is situated in front of the cuttingknives and can be varied inconstruction to conform to the conditions necessary to apply Serial No.346,756. (No model.)

ingly secured in relation to each other and to the planer-head, so thatafter the end of a piece of timber has been operated upon by theplaner-head it will be clamped between the feeding-out rolls or betweena rigid bedplate and the rigid rolls above it, as the case may be, andwill be held in that position until the entire length of the piece oftimber has passed over the planer-head in the same plane in which itentered in between the feedingout rolls, irrespective of the passage ofthe warped or uneven portion over the elastic surface of the feeding-inend of the planer. This addition B is hinged to the main frame A at oneside 5, so that frame B can be swung around out of the way, and thusexpose the under rotary cutter-head C, so that the knives can be easilytaken off or replaced when necessary, the device shown being a commonexpedient to planers having a lower cutter-head.

In Figs. 4 and 5 at D is shown a frame for holding the upper series offront feed-rolls. The head of the frame D has five rolls d shown; buteither more or less can be used. These rolls are journaled in boxes 6 ateach end, Fig. 5. Secured to the frame D atf are twodownwardly-projecting side pieces E, which, when in operative position,straddle the main frame A, one 011 each side, Fig. l, and fitted toslide vertically between dovetailed lugs g, Fig. 1.

In Figs 2 and 4. are shown lugs h, which project into the interior offrame A through a slot shown. One of these lugs is shown at the lowerend of the side pieces Ein Fig. 4. There is a vertical shaft F, Fig. 2,which is threaded at the lower end and is journaled in two lugsj and j.The threaded portions of shafts F operate in a threaded hole in lugs hof side pieces E, one on each side of the machine. At the top end ofshaft F is a miter cog-wheel 7a, which engages a miter cog-wheell, whichis secured to a horizontal shaft G, Figs. 1 and 2. Shaft Gis journaledacross the main frame A and hasa hand-wheel II, by which it is operated,Fig. 1, and by this means the frame D, together with its feed-rolls d,can be raised and lowered to and from the compressible bed-plate toadmit either thin or thick material to be planed, as will now beexplained. The com: pressible bed-plate is shown in isometricperspective in Fig. 3 and consists of several rollers m, which consistof a central shaft 72, upon which is a number of metal rings 0, filledwith a good quality of elastic rubber c. The detached View of thesections of the roller is shown in Fig. 3, right-hand side.

The ends of the shafts of the rollers m are journaled in boxes 0, whichboxes are fitted to move in vertical slots in the upwardly-projectingsides of the base-plate I. Under each box is a piece of rubber 0, whichacts as springs and resists to a degree any ordinary downward pressureupon the rollers m and their boxes 0.

At J is a pressure-bar, which is composed of a bar upon which is secureda steel spring having its upper edges split into a series of teeth 19,all of about the same length. The outer front ends of these teethp standat the same level as the upper surface of the rollers m. Thepressure-bar J is held in position at each end by being fitted to avertical slot q, and the ends rest upon rubber springs at the bottom ofslot q, and thus it will be seen that not only the contact-surface withthe lumber being planed of both the rollers m and the spring-teeth p ofthe pressure-bar J is compressible, but also the journal-boxes o and theends of pressure-bar J rest upon rubber springs. The whole body of therollers and pressure-bar can sink at one or both ends to suit any greatpressure that may be brought to bear upon them by the uneven surface ofany material which may be worked.

The base-plate I has four inclined planes 8, one near each of its fourcorners, and these inclined planes rest upon the face of four otherinclined planes 5, which have a place upon the sides and upper face of alongitudinally-sliding plate underneath the base-plate I. The base-plateI is held from direct longitudinal movement by means of four links 25,attached one near each inclined plane 8. The threaded shaft to throughits hand-wheel w acts to move the slide with its inclined planes 3longitudinally of the machine, which causes the base-plate I, togetherwith its bed of rollers m,to rise or fall, as required. This means, asis well known,is in common use to accomplish the purpose named, andtherefore I do not claim it.

In Fig. 2 is partially shown a number of cog-wheels 7a, which connectall the upper front feed-rolls. These rolls may be driven or connectedto the source of power by any well-known train of gearing. The upper andlower rear feeding-out rolls a are also driven by any well-known systemof gearing.

The operation of this is the same as any other machme the class havingwhat is called a lower cuttlngcyim der, with the exception Of theconllplesslb1e bed-plate. Planing-machines which have a solid bed-platein front and at the rearof the ordinary cylinder cutter-head, when thecutter-head is below the table or bed-plates, are in common useWithoutfeed-gearings and are commonly called hand-planers, and are forthe purposeof planing the warp and wind out of stock, Whiclrmust have aplane surface, such as is required for furniture, patterns, 850. Mycompressible bed-plate takes the place of the first or fronttable of ahandplaner, and when the stock is fed in the upper front rollers areheld rigid, while any irregularities in the stock force down both thesurface and main body of the lower front rollers, and when the stock isfed,in far enough to reach the cutters its irregularities are cut away.When the end of the stock reaches the rear bed-plate or table, therollers a hold it in perfect line with the direction it assumed whenfirst contacting with the cutters.

I claim as my invention- 1.'A planing-machine having its planerheadbelow the table, the surface of the table or bed of the machine at thefront or feeding-in end of the table being compressible or elastic andthe delivery or rear end of the bed being rigid, and rollers above thesame, rigidly or unyieldingly supported in relation thereto and to theplaner-head, whereby the stock is supported in its warped condition infront of the planer-head and held with its planed or straighten edsurface upon the rigid portion of the bed of the machine, substantiallyas described.

2. A planing-machine having its planerhead below the table, the surfaceof the table or bed of the machine at the front or feeding-in end of thetable being compressible or elastic and provided with a spring-toothedpressure-bar adjacent to the planer-head and the rear end of the tablerigid, substantially as described.

3. In a planing-machine having its planerhead below the table, thecombination, with the bed or table, of a bar in front of the planer-headand a'steel spring yieldingly secured thereto, having its upper edgesplit into a series of teeth, substantially as described.

4. In a planing-machine having its planerhead below the table, thecombination, with the main frame, of a Vertically-movable frame havingslots in its side pieces, a bar in the slots nearest the planer-head,having a toothed spring-plate secured thereto, and a series ofcompressible rollers yieldingly journaled in the remaining slots of theside pieces, substantially as described.

JOSEPH SORENSON.

IVitnesses:

OSCAR SNELL, A. A. KATLEK.

